Functionalized choline chloride ionic liquid, preparation method thereof and use in electrochemical energy storage device
申请人:GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES
公开号:US09728806B2
公开(公告)日:2017-08-08
The present invention discloses a process for preparing a functionalized choline chloride ionic liquid as defined in formula (I), and thereof use in an electrochemical energy storage device, as an electrolyte solution or an additive for a lithium ion battery and a supercapacitor. The ionic liquid electrolyte material has better biocompatibility, flame retardance, high ionic conductivity, low viscosity, and wide electrochemical window.
wherein R1 is selected from the group consisting of: (CH2═CH—(CH2)n)—, CN(CH2)n—, or R23Si—; R2 is selected from CH3—(CH2)m—, n is an integer selected from 1 to 3, m is an integer selected from 0 to 2; or one of R2 is (CH3)3Si—O—. Anion A in Formula I is selected from the group consisting of: Cl−, Br−, I−, BF4−, NO3−, SO42−, CF3COO−, CF3SO3−, (CF3SO2)2N−, PF6−, BF2C2O4−, or B(C2O4)2−.
本发明公开了一种制备功能化氯化胆碱离子液体的方法,其定义如公式(I)中所示,并且在电化学储能装置中使用,作为电解质溶液或锂离子电池和超级电容器的添加剂。该离子液体电解质材料具有更好的生物相容性、阻燃性、高离子导电性、低粘度和宽电化学窗口。其中,R1选自以下组:(CH2═CH—(CH2)n)—,CN(CH2)n—,或R23Si—;R2选自CH3—(CH2)m—,n是选自1至3的整数,m是选自0至2的整数;或R2中的一个是(CH3)3Si—O—。公式I中的阴离子A选自以下组:Cl−,Br−,I−,BF4−,NO3−,SO42−,CF3COO−,CF3SO3−,(CF3SO2)2N−,PF6−,BF2C2O4−,或B(C2O4)2−。